Dictionary.com has it as a real word....if I can’t find it in an American dictionary, I don’t use the word.
And not just in English!
https://books.google.com/books?id=IrHgCwAAQBAJ&pg=PA130&lpg=PA130&dq=tohubohu+walter+lippmann&source=bl&ots=TdN2MpejeV&sig=ml2QMKlfdo8AzU47JYWl3ZwY9sE&hl=en&sa=X&ved=0ahUKEwiAos-dpr7NAhWESSYKHZlFD-MQ6AEIIzAB#v=onepage&q=tohubohu%20walter%20lippmann&f=false